Well, it depends on what you call noisy. [smile] Because of the design of the Rotex, it does make a louder noise than some sanders.
You can hear what it sounds like at this beginning of this video. Or, there are plenty of others on YouTube as well.
If in doubt, give the service department a buzz and turn it on and let them hear it over the phone or shoot your own video and we'll have a look at it.
Shane